Ultrasound or LMP due date?

Elaine • Mom of two girls’ 👧 👧 born in Feb 2017 & August 2019!

Which are you guys using for due date? Just did my 12 weeks scan ( although I’m 13wks) and baby is measuring 14wks per scan and per LMP it’s 13.2! Which do you guys take? My doctor didn’t seem to worry bc they aren’t that far apart.